Re-reland: Remove register index/code indirection

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 3c42194e0102fd4ee38a3b1cf46126557243f3d9..7aed57853bea070cd9a4d8a3be174ec93384ee9d 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -10,6 +10,7 @@
 #include "src/codegen.h"
 #include "src/cpu-profiler.h"
 #include "src/debug/debug.h"
+#include "src/register-configuration.h"
 #include "src/runtime/runtime.h"
 
 #include "src/arm64/frames-arm64.h"
@@ -3977,14 +3978,16 @@ void MacroAssembler::PushSafepointRegisters() {
 
 void MacroAssembler::PushSafepointRegistersAndDoubles() {
   PushSafepointRegisters();
-  PushCPURegList(CPURegList(CPURegister::kFPRegister, kDRegSizeInBits,
-                            FPRegister::kAllocatableFPRegisters));
+  PushCPURegList(CPURegList(
+      CPURegister::kFPRegister, kDRegSizeInBits,
+      RegisterConfiguration::ArchDefault()->allocatable_double_codes_mask()));
 }
 
 
 void MacroAssembler::PopSafepointRegistersAndDoubles() {
-  PopCPURegList(CPURegList(CPURegister::kFPRegister, kDRegSizeInBits,
-                           FPRegister::kAllocatableFPRegisters));
+  PopCPURegList(CPURegList(
+      CPURegister::kFPRegister, kDRegSizeInBits,
+      RegisterConfiguration::ArchDefault()->allocatable_double_codes_mask()));
   PopSafepointRegisters();
 }